• KOREAN JOURNAL OF CROP SCIENCE
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• v.60 no.2
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• pp.231-238
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• 2015

This study was carried out to determine environmental factors affecting the anthocyanin content of color-fleshed potato (Solanum tuberosum L.) tubers. After planting of two color-fleshed potato cultivars of 'Hongyoung' and 'Jayoung' in different 14 locations, their soil chemical properties and meteorological data were evaluated, and anthocyanin contents of tubers were analyzed after harvest, additionally their relationship among them was analyzed through correlation analysis. In comparison with two cultivars, purple-fleshed 'Jayoung' potatoes showed higher anthocyanin content than red-fleshed 'Hongyoung' in almost locations. When locations were divided to three categories (highland, sub-highland and lowland) according to altitude, in general, highland-grown tubers had the higher content of anthocyanin compared to those grown in lowland. An analysis of the results of chemical components of soil showed that anthocyanin content of color-fleshed potato tubers was negatively correlated with the pH of soil. In addition, mean temperature and minimum temperature from 80 to 100 days after planting most significantly affected on the accumulation of anthocyanin in color-fleshed potato tubers, that is, higher content of anthocyanin was observed in tubers produced in locations with lower mean temperature and minimum temperature from 80 to 100 days after planting. This information can be useful to producers and industries in selection of proper fields for the production of color-fleshed potato tubers having high quality in Korea.

• Korean Journal of Plant Resources
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• v.19 no.4
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• pp.517-520
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• 2006

The effects of culture soil combinations on growth of native pteridophyte (Pteris multifida, Cyrtomium falcatum and Cheilanthes argentea) were investigated in this study. Six different culture soil mixtures used for cultivating the pteridophytes under 30% shading condition. Pteris multifida was showed the most growth at the culture soil mixtures of peatmoss : living moss (5 : 5), and peatmoss : perlite (7 : 3). Cyrtomium falcatum and Cheilanthes argentea showed the best growth in the culture soils mixtures of sand : soil : leaf mold (2 : 5 : 3) and peatmoss : perlite (7 : 3, 5 : 5), respectively.

• Research in Plant Disease
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• v.24 no.4
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• pp.339-341
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• 2018

Amaranth has the potential for good materials related to nutrients and health benefits. There are several diseases of amaranth such as leaf blight, damping-off, and root rot. As a causal agent of soft rot disease, Pectobacterium spp. could infect various plant species. In this study, we isolated the bacterial pathogen causing soft rot of amaranth in South Korea. In Gangneung, Gangwon province during 2017, amaranth plants showed typical soft rot symptoms such as wilting, defoliation and odd smell. To isolate pathogen, the macerated tissues of contaminated amaranth were spread onto LB agar plates and purified by a single colony subculture. One ml bacterial suspension of a representative isolate was injected to the stem of five seedlings of 2-week-old amaranth with a needle. Ten mM magnesium sulfate solution was used as a negative control. 16S rDNA gene and recA gene were sequenced and compared with the reference sequences using the BLAST. In the phylogenetic tree based on 16S rDNA gene and recA gene, GSA1 strain was grouped in Pcb.

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.10a
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• pp.211-211
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• 2022

Amaranth is a nutritious and broadly adapted seed crop in high demand around the world. A preliminary approach for understanding the genetics of amaranth resources entails a morphologic characterization, which can provide the basis for breeding the first variety in Korea, leading to satisfying the needs of farmers and consumers. Therefore, this study aimed to evaluate the phenotypic characteristics of ten genetic amaranth accessions for the selection of outstanding accessions in terms of yield and grain quality. A randomized complete block design was used, with fifteen replications for each accession under field conditions. Five quantitative and three qualitative descriptors were evaluated with descriptive analysis. The results showed that the accessions with plant heights smaller than the average (>112.7 cm) presented lower yields and smaller seed sizes, thus decreasing the grain quality. The cluster analyses established groups of accessions with good yields (>30.1 g of seeds per plant) and stable morphological characteristics. Based on yield and morphological descriptors, the proposed selection index indicated four accessions as potential parents for amaranth breeding programs in Kora.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2023.04a
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• pp.39-39
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• 2023

The purpose of this study is to investigate vasodilatation effect of complex saponin separated from Scrophulariae radix, Asparagus cochinchinensis and Liriope platyphylla mixture extract on rabbit carotid artery. In this study, to determine vasodilatation effect of complex saponin separated from Scrophulariae radix, Asparagus cochinchinensis and Liriope platyphylla mixture extract on rabbit carotid artery, arterial rings with intact or damaged endothelium were used for experiment using organ bath, and were contracted by endothelin. complex saponin, major active constituents of Scrophulariae radix, Asparagus cochinchinensis and Liriope platyphylla mixture extract, showed a moderate vasodilatation effect on the basilar arteries of rabbits. Therefore, treatment with complex saponin separated from Scrophulariae radix, Asparagus cochinchinensis and Liriope platyphylla mixture extract may selectively accelerate cerebral blood flow through dilatation of the basilar artery. Theseis result suggest a potential role of complex saponin separated from Scrophulariae radix, Asparagus cochinchinensis and Liriope platyphylla mixture extract as source of vasodilatation agent.

• Proceedings of the Korean Society of Plant Biotechnology Conference
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• 2005.04a
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• pp.153-153
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• 2005

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2014.10a
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• pp.187-190
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• 2014

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.51-51
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• 2019

고랭지(해발고도 400m 이상)는 전국 밭 면적의 24.7%을 차지하고 있고 경사도가 15도 이상인 지역이 58.7%인 41,812ha에 달한다. 고랭지 농업은 주로 해발고도가 높은 산지의 경사지에서 이루어지고 있고, 대부분 작물 재배기간이 5월부터 9월까지 약 5개월 정도로 짧아, 나머지 7개월은 토양 피복이 이루어지지 않은 상태로 있어 토양유실 가능성이 높다. 이러한 문제점을 개선하기 위해 본 연구에서 경관성이 높은 구절초를 식재하여 토양유실 저감 효과를 구명하였다. 고랭지 경사도 55도 라이시미터(Lysimeter)에서 가로 1.2m에 세로 1.8m의 규격으로 시험을 수행하였다. 관행구로 나지(Control, TC) 대비 식재 당시 피복정도에 따라, 피복율 40%는 T1, 피복율 70%는 T2로 하여 총 3처리를 두었다. 구절초의 개화기(10월 1일) 피복율을 조사한 결과 대조구인 나지상태는 0%의 피복율인데 이에 반해 구절초 식재 처리구는 57~80%로 경사지 토양을 피복시키는 효과가 가장 높은 경향을 보였다. 경관작물인 구절초를 식재할 경우 나지 TC를 기준으로 유출량이 65~71%, 토양유실이 87~99% 감소되어 강우에 의한 토양유실 경감에 매우 효과적이었다. 또한, 유거수 탁도 저감 효과성이 뛰어났다. 따라서, 고랭지 경사지에 영년생 자원식물 중 경관성이 뛰어난 구절초를 식재함으로서 경사지 토양유실을 경감시킬 수 있고, 부가가치가 높은 고소득작물로 활용 가치가 높다.

• Proceedings of the Korean Society of Crop Science Conference
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• 2017.06a
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• pp.181-181
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• 2017

Global warming and climate change have been one of the most important problems last 2 decades. Global warming is known to cause abnormal climate and influence ecology, food production and human health. According to climate change model global warming is causing expansion of drought and increase of evaporation. Therefore, securing water in agriculture has been an important issue for crop cultivation. As potato is susceptible to drought, water shortage generally results in decrease of yield and decrease of biomass. In this research, we investigated characteristics of inorganic nutrient absorption and growth of plants grown under drought condition. Plants were sampled in sites of Cheong-ju and Gangneung, where the severity of drought stress were different. During the growth period in Gangneung, total rainfall in 2016 decreased by 50% compared with those in last 5 years average. Especially, there was almost no rain in tuber enlargement period (from mid-May to mid-June). On the other hand, the total rainfall in of Cheong-ju was is similar to those in last 5 years average. Inorganic components including K, Ca and Mg and plant growth factors such as plant length, stem length, leaf area index and plant biomass were investigated. Tuber yields in both areas were investigated at harvest. Growth period of plants was is longer in Cheong-ju than that in Gangneung. Contents of all inorganic components were higher in plants grown in Cheong-ju than in Gangneung. The results were attributed to higher production of plant biomass in Cheong-ju. Considering the results, severe drought stress conditions in Gangneung accelerated plant aging and resulted in low plant growth. Although total yield was greatly reduced under drought stress the rate of commercial yield was is not significantly different with non-drought conditions.

• Korean Journal of Soil Science and Fertilizer
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• v.39 no.5
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• pp.285-291
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• 2006

The lysimeter ($1.2m\;with{\times}1.6m\;length$) experiment using $^{15}N$ tracer method was conducted to investigate the influence of slopes (degree 5, 15 and 30%) and fertilizer application methods (solid application and fertigation) on the behavior of applied urea in saprolite piled highland with Chinese cabbage cultivation. NDFFs(nitrogen derived from fertilizer) in soil were increased with decreasing of degree of slope and of depth of soil. The recovery as percentage of fertilizer nitrogen by Chinese cabbage were 69.5% for solid application and 76.5% for fertigation in 5% slope, 65.0% for solid application and 70.2% for fertigation in 15% slope, and 56.1% for solid application and 62.3% for fertigation in 30% slope. There, fertigation will make great contributions to the reduction of environmental contamination by run off and to the increase of fertilizer efficiency in Chinese cabbage cultivated highland.